3 years ago

HELP IT'S URGENT, WILL GIVE BRAINLIEST!!!

Mathematics

1 answer:

belka [17]3 years ago

4 0

Answer:

ECD=87

Step-by-step explanation:

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Which of the following is evaluated to 18-√-25?<br> 1) 5i<br> 2) 18-5i<br> 3) 18+5i<br> 4) 23

xz_007 [3.2K]

Option 2: 18-5i is the right answer

Step-by-step explanation:

Given

$18-\sqrt{-25}$

When there is a negative number in radical, a new complex number iota denoted by i is introduced which is equal to $\sqrt{-1}$

So we will solve the given expression

$18-\sqrt{-25}\\= 18- (\sqrt{25*-1})\\= 18 - (\sqrt{25} * \sqrt{-1})\\= 18 - (5*i) = >\sqrt{-1} = i\\= 18 - 5i$

Hence,

Option 2: 18-5i is the right answer

Keywords: Iota, complex numbers

Learn more about complex numbers at:

#LearnwithBrainly

6 0

4 years ago

Quick math help please ty!

wel

Every choice has slope 1/2

Only the third one is true when x=-5 and y=2. giving zero on both sides

Answer: third choice, y-2=(1/2)(x+5)

8 0

3 years ago

What is the algebraic expression for "the difference between seven times a number and three times that number"? 7 - 3 x 7 x - 3

DedPeter [7]

7x-3x is prob the answer

8 0

4 years ago

Read 2 more answers

Please help asap !! It’s for a exam and it’s due very soon .

katrin [286]

Answer:

32 cans

Step-by-step explanation:

I guessing I could be wrong

btw tell me if its correct

4 0

3 years ago

Complete the input-output table that represents the linear function y=−2x+8.

Fofino [41]

You substitute the x with 1
Y=-2x(1)+8

So y = 6

3 0

3 years ago